Hi,

I want to connect a Honeywell CT51A t-stat and I don't know what colored wires go with what terminals. I do not have air conditioning.

The cable from the furnace has 5 wires

On the furnace, the wires are connected as follows:
White - T
Red - 3T
Black - R
Blue - G
Orange - Y

On my t-stat I have the following terminals:

R
1
2
G
Y
W

Help!

Do you have a heatpump?, is the new tstat heatpump compatible?, should say on the package,, some say 2 heat / 1 ac,, some say heat/cooling tstat,, some say heat only,, some say cooling only

Honeywell #CT51A-1035 24V Heat/CoolThermostat====== if this is what you have and you have a heatpump, it won`t work

Hi,

No I don't have a heat pump. I have oil forced air furnace.

On the furnace, the wires are connected as follows:
white - T
Red - 3T
Black - R
Blue - G
Orange - YAre there any other wires connected to any of these terminals?


On my t-stat I have the following terminals:

R
1
2
G
Y
W

Help!!Are you referring to the old, or new t-stat? If new, what colors/letters were connected on the old one?

No Nothing.

I purchased the Honeywell thermostat new. My wife took off the old thermostat but didn't write down what colors were with what terminals on the old thermostat.

My wife took off the old thermostat but didn't write down what colors were with what terminals on the old thermostat.Save that one for the next time she calls you "stupid"... ;) Stay tuned...

I just checked Honeywell.com, CT51A does not match any documents/search criteria. Are you sure this is an accurate/complete model # ?

It's on the Honeywell web site under do-it-yourself, non-programable, non-digital, standard thermostats.

Below is a link for Ace Hardware showing the exact thermostat.

HONEYWELL CT51A1035 THERMOSTAT STD FOR HEAT/COOL APPLICATIONS CT51 (http://www.acehardwareoutlet.com/(h1kd4hfno0bws255kj4344rr)/ProductDetails.aspx?SKU=46088)

Just cut and paste into your browser.

That's a nice pic, but no useful info is available there. I would need to view the wiring diagram for the t-stat to determine the function of each terminal. It should be with the installation instructions. If you could scan & post image, we may get somewhere.

Here is a link for a .pdf file off the Honeywell website showing the back of the thermostat.


http://customer.honeywell.com/techlit/pdf/69-0000s/69-0265b.pdf